begin_tests(+Name, 
+Options)Defined options are:
- blocked(+Reason)
 - Test-unit has been blocked for the given Reason.
 - condition(:Goal)
 - Executed before executing any of the tests. If Goal fails, the test of this unit is skipped.
 - setup(:Goal)
 - Executed before executing any of the tests.
 - cleanup(:Goal)
 - Executed after completion of all tests in the unit.
 - occurs_check(+Mode)
 - Specify default for subject-to-occurs-check mode. See section 
2 for details on the 
occurs_checkoption.